Shares of Sirius XM Radio (Nasdaq: SIRI) have just spiked about 2.4 percent in mid-day trade Tuesday as traders seem to be pushing the stock above a technical level at $1.85. While we are not hearing any news, two large block trades several minutes apart which crossed at $1.88 are creating interest.

The stock is now up 3.5 percent on the session; shares last traded at $1.90.